Merge pull request #148 from dwango/add_GenericCallUtility

Added GenericCallUtility

Assets/VRM/UniJSON/Editor/Tests/GenericCallUtilityTests.cs

@@ -0,0 +1,43 @@
+using UnityEngine;
+using NUnit.Framework;
+using System.Collections;
+using System;
+
+
+namespace UniJSON
+{
+    public class GenericCallUtilityTests
+    {
+        class Sample
+        {
+            public int Value
+            {
+                get;
+                private set;
+            }
+
+            public void Set(int value)
+            {
+                Value = value;
+            }
+        }
+
+
+
+        [Test]
+        public void GenericCallUtilityTestsSimplePasses()
+        {
+            var s = new Sample();
+
+            var mi = s.GetType().GetMethod("Set");
+
+            var invoke = (Action<Sample, int>)GenericInvokeCallFactory.Create<Sample, int>(mi);
+            invoke(s, 1);
+            Assert.AreEqual(1, s.Value);
+
+            var exp = (Action<Sample, int>)GenericExpressionCallFactory.Create<Sample, int>(mi);
+            exp(s, 2);
+            Assert.AreEqual(2, s.Value);
+        }
+    }
+}

Assets/VRM/UniJSON/Scripts/GenericCallUtility/GenericExpressionCallFactory.cs

@@ -0,0 +1,134 @@
+using System;
+using System.IO;
+using System.Linq;
+using System.Text;
+#if UNITY_EDITOR
+using UnityEditor;
+#endif
+
+
+namespace UniJSON
+{
+    public static partial class GenericExpressionCallFactory
+    {
+#if UNITY_EDITOR && VRM_DEVELOP
+        const int ARGS = 6;
+        const string GENERATE_PATH = "Assets/VRM/UniJSON/Scripts/GenericCallUtility/GenericExpressionCallFactory.g.cs";
+
+        static System.Collections.Generic.IEnumerable<string> GetArgs(string prefix, int n)
+        {
+            for (int i = 0; i < n; ++i)
+            {
+                yield return prefix + i;
+            }
+        }
+
+        [MenuItem(VRM.VRMVersion.MENU + "/Generate GenericExpressionCallFactory")]
+        static void Generate()
+        {
+            var sb = new StringBuilder();
+            using (var w = new StringWriter(sb))
+            {
+                w.WriteLine(@"
+using System;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Reflection;
+
+
+namespace UniJSON
+{
+    public static partial class GenericExpressionCallFactory
+    {
+");
+                // Create
+                for (int i = 1; i <= ARGS; ++i)
+                {
+                    var g = String.Join(", ", GetArgs("A", i).ToArray());
+                    var a = String.Join(", ", GetArgs("a", i).ToArray());
+
+                    var source = @"
+#if UNITY_5
+        public static Delegate Create<S, $0>(MethodInfo m)
+#else
+        public static Action<S, $0> Create<S, $0>(MethodInfo m)
+#endif
+        {
+            var self = Expression.Parameter(m.DeclaringType, m.Name);
+            var args = m.GetParameters().Select(x => Expression.Parameter(x.ParameterType, x.Name)).ToArray();
+            var call = Expression.Call(self, m, args);
+            return 
+#if UNITY_5
+#else
+                (Action<S, $0>)
+#endif
+                Expression.Lambda(call, new[] { self }.Concat(args).ToArray()).Compile();
+        }
+".Replace("$0", g).Replace("$1", a);
+
+                    w.WriteLine(source);
+                }
+
+                // CreateWithThis
+                for (int i = 1; i <= ARGS; ++i)
+                {
+                    var g = String.Join(", ", GetArgs("A", i).ToArray());
+
+                    var source = @"
+#if UNITY_5
+        public static Delegate CreateWithThis<S, $0>(MethodInfo m, S instance)
+#else
+        public static Action<$0> CreateWithThis<S, $0>(MethodInfo m, S instance)
+#endif
+        {
+            if (m.IsStatic)
+            {
+                if (instance != null)
+                {
+                    throw new ArgumentException();
+                }
+            }
+            else
+            {
+                if (instance == null)
+                {
+                    throw new ArgumentNullException();
+                }
+            }
+
+            var self = Expression.Constant(instance, typeof(S)); // thisを定数化
+            var args = m.GetParameters().Select(x => Expression.Parameter(x.ParameterType, x.Name)).ToArray();
+            MethodCallExpression call;
+            if (m.IsStatic)
+            {
+                call = Expression.Call(m, args);
+            }
+            else
+            {
+                call = Expression.Call(self, m, args);
+            }
+            return 
+#if UNITY_5
+#else
+                (Action<$0>)
+#endif
+                Expression.Lambda(call, args).Compile();
+        }
+".Replace("$0", g);
+
+                    w.WriteLine(source);
+                }
+
+                w.WriteLine(@"
+    }
+}
+");
+            }
+
+            var path = UniGLTF.UnityPath.FromUnityPath(GENERATE_PATH);
+            File.WriteAllText(path.FullPath, sb.ToString().Replace("\r\n", "\n"));
+            path.ImportAsset();
+        }
+#endif
+    }
+}